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MIPS: implement bit manipulating I/O accessors

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Add support for functions clrbits_X(), setbits_X() and clrsetbits_X()
on MIPS.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
This commit is contained in:
Daniel Schwierzeck 2016-01-15 15:54:48 +01:00
parent 898582bdee
commit 0e0efb40b8
1 changed files with 55 additions and 0 deletions
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55
arch/mips/include/asm/io.h
View file

@ -541,4 +541,59 @@ static inline void unmap_physmem(void *vaddr, unsigned long flags)
{
}
#define __BUILD_CLRBITS(bwlq, sfx, end, type) \
\
static inline void clrbits_##sfx(volatile void __iomem *mem, type clr) \
{ \
type __val = __raw_read##bwlq(mem); \
__val = end##_to_cpu(__val); \
__val &= ~clr; \
__val = cpu_to_##end(__val); \
__raw_write##bwlq(__val, mem); \
}
#define __BUILD_SETBITS(bwlq, sfx, end, type) \
\
static inline void setbits_##sfx(volatile void __iomem *mem, type set) \
{ \
type __val = __raw_read##bwlq(mem); \
__val = end##_to_cpu(__val); \
__val |= set; \
__val = cpu_to_##end(__val); \
__raw_write##bwlq(__val, mem); \
}
#define __BUILD_CLRSETBITS(bwlq, sfx, end, type) \
\
static inline void clrsetbits_##sfx(volatile void __iomem *mem, \
type clr, type set) \
{ \
type __val = __raw_read##bwlq(mem); \
__val = end##_to_cpu(__val); \
__val &= ~clr; \
__val |= set; \
__val = cpu_to_##end(__val); \
__raw_write##bwlq(__val, mem); \
}
#define BUILD_CLRSETBITS(bwlq, sfx, end, type) \
\
__BUILD_CLRBITS(bwlq, sfx, end, type) \
__BUILD_SETBITS(bwlq, sfx, end, type) \
__BUILD_CLRSETBITS(bwlq, sfx, end, type)
#define __to_cpu(v) (v)
#define cpu_to__(v) (v)
BUILD_CLRSETBITS(b, 8, _, u8)
BUILD_CLRSETBITS(w, le16, le16, u16)
BUILD_CLRSETBITS(w, be16, be16, u16)
BUILD_CLRSETBITS(w, 16, _, u16)
BUILD_CLRSETBITS(l, le32, le32, u32)
BUILD_CLRSETBITS(l, be32, be32, u32)
BUILD_CLRSETBITS(l, 32, _, u32)
BUILD_CLRSETBITS(q, le64, le64, u64)
BUILD_CLRSETBITS(q, be64, be64, u64)
BUILD_CLRSETBITS(q, 64, _, u64)
#endif /* _ASM_IO_H */